diff -urN harfbuzz-8.4.0.old/src/hb-cff-interp-dict-common.hh harfbuzz-8.4.0/src/hb-cff-interp-dict-common.hh
--- harfbuzz-8.4.0.old/src/hb-cff-interp-dict-common.hh	2024-03-29 20:03:04.000000000 +0530
+++ harfbuzz-8.4.0/src/hb-cff-interp-dict-common.hh	2024-08-16 14:53:09.265168054 +0530
@@ -84,7 +84,7 @@
 
     enum Nibble { DECIMAL=10, EXP_POS, EXP_NEG, RESERVED, NEG, END };
 
-    char buf[32];
+    char buf[32] = {0};
     unsigned char byte = 0;
     for (unsigned i = 0, count = 0; count < ARRAY_LENGTH (buf); ++i, ++count)
     {
diff -urN harfbuzz-8.4.0.old/test/api/test-font.c harfbuzz-8.4.0/test/api/test-font.c
--- harfbuzz-8.4.0.old/test/api/test-font.c	2024-03-29 20:03:04.000000000 +0530
+++ harfbuzz-8.4.0/test/api/test-font.c	2024-08-16 14:53:09.266168070 +0530
@@ -417,7 +417,7 @@
   font2 = hb_font_create_sub_font (font1);
   hb_font_destroy (font1);
   ffuncs2 = hb_font_funcs_create ();
-  hb_font_funcs_set_nominal_glyphs_func (ffuncs1, nominal_glyphs_func, NULL, NULL);
+  hb_font_funcs_set_nominal_glyphs_func (ffuncs2, nominal_glyphs_func, NULL, NULL);
   hb_font_set_funcs (font2, ffuncs2, NULL, NULL);
   hb_font_funcs_destroy (ffuncs2);
 
diff -urN harfbuzz-8.4.0.old/util/hb-subset.cc harfbuzz-8.4.0/util/hb-subset.cc
--- harfbuzz-8.4.0.old/util/hb-subset.cc	2024-03-29 20:03:04.000000000 +0530
+++ harfbuzz-8.4.0/util/hb-subset.cc	2024-08-16 14:53:09.267168086 +0530
@@ -792,6 +792,7 @@
       g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
 		   "Failed reading file `%s': %s",
 		   arg, strerror (errno));
+      fclose(fp);
       return false;
     }
     g_string_append_c (gs, '\0');
@@ -812,6 +813,8 @@
 
   g_string_free (gs, false);
 
+  fclose(fp);
+
   return true;
 }